Hello, I rediscovered an old bug https://bugs.r-project.org/bugzilla/show_bug.cgi?id=12572 It was reported six years ago, but hasn't been accepted or rejected. Is there a plan to address it soon ?> sessionInfo()R version 3.1.1 (2014-07-10) Platform: x86_64-unknown-linux-gnu (64-bit) -------------------------------------- Dario Strbenac PhD Student University of Sydney Camperdown NSW 2050 Australia